Science and Life: Aberdeen AddressesJ. Murray, 1920 - 229 páginas This work is a collection of addresses and articles written at Aberdeen University regarding the interaction between science and society. |
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Página 102
... lead is 207.2 . The atomic weight of bismuth is 208 , but the writer was unable to find in a special examination of over 20 kilograms of a certain thorium mineral even a trace of bismuth , though there was 0.3 per cent . of lead . This ...
... lead is 207.2 . The atomic weight of bismuth is 208 , but the writer was unable to find in a special examination of over 20 kilograms of a certain thorium mineral even a trace of bismuth , though there was 0.3 per cent . of lead . This ...
Página 103
... by radioactivity and alone concerned in this phenomenon . The same outer and inner shells - that is , the same kind of atom to the older knowledge - may contain demonstrably Gold · 197.2 Mercury 200.6 Thallium 204.0 Lead 207.2 Bismuth.
... by radioactivity and alone concerned in this phenomenon . The same outer and inner shells - that is , the same kind of atom to the older knowledge - may contain demonstrably Gold · 197.2 Mercury 200.6 Thallium 204.0 Lead 207.2 Bismuth.
Página 104
Aberdeen Addresses Frederick Soddy. Gold · 197.2 Mercury 200.6 Thallium 204.0 Lead 207.2 Bismuth 208.0 different nuclei . Matter is of indefinitely more kinds ... LEAD - THE FINAL PRODUCT 105 The figures in the 104 THE EVOLUTION OF MATTER.
Aberdeen Addresses Frederick Soddy. Gold · 197.2 Mercury 200.6 Thallium 204.0 Lead 207.2 Bismuth 208.0 different nuclei . Matter is of indefinitely more kinds ... LEAD - THE FINAL PRODUCT 105 The figures in the 104 THE EVOLUTION OF MATTER.
Página 105
... lead . The atomic weight of the end product of uranium should be 206 and that for thorium 208 , whereas the atomic weight of common lead is 207.2 . This suggests that common lead is a mixture of isotopes rather than a single homogeneous ...
... lead . The atomic weight of the end product of uranium should be 206 and that for thorium 208 , whereas the atomic weight of common lead is 207.2 . This suggests that common lead is a mixture of isotopes rather than a single homogeneous ...
Página 106
... lead , whereas the atomic weight of lead derived from minerals rich in uranium is lower . The values in fact vary from 206.0 to 207.7 . The densities of the varieties of the lead , the writer recently found , differ in exactly the same ...
... lead , whereas the atomic weight of lead derived from minerals rich in uranium is lower . The values in fact vary from 206.0 to 207.7 . The densities of the varieties of the lead , the writer recently found , differ in exactly the same ...
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a-particle Aberdeen actinium active ancient animal Arts atomic number atomic weight B-ray bismuth branch British Science Guild Carnegie Trust cent century chemical character chemical elements chemist chemistry classical coal commercial education conception creative definite direction discovery disintegration electricity electrons emanation energy evolved existence expelled experimental external Faculty FREDERICK SODDY fundamental H. H. Asquith helium hitherto human ideals inanimate universe investigation ionium isotopes J. J. Thomson knowledge known labour lead living mass material means mechanism ment million mind minerals modern nation nature original past Periodic Law periodic table philosophy physical pitchblende polonium practical present problem processes pure quantity radio-elements radioactive change radium radium-C recognised regard religion scientific study Scotland Soddy spectroscopic spectrum spirit study and research subjects successive teaching technical or commercial thallium thought tion to-day transmutation truth ultimate University of Aberdeen uranium and thorium wealth whole